original document or work; source text; root or origin
Most often refers to the original document, book, certificate, manuscript, or other source item, as opposed to a copy, transcript, translation, or later version. The broader meaning of 'source/root/origin' is usually tied to something that can serve as an original source; when no document or text is involved, words such as 起源, 源, or 根本 may be more natural.
